feat(calls): selectable incoming-call ringtone (#4)

Adds a ringtoneId setting (classic | chime | soft | retro | none) so the
incoming-call ring is no longer hardcoded to call.ogg. The three synth
styles are generated in-browser via a new utils/ringtones.ts module
(mirroring the existing callSounds.ts WebAudio pattern), so no new binary
assets are bundled; 'classic' keeps the existing call.ogg clip and 'none'
is a silent, visual-only incoming-call UI.

- ringtones.ts: startRingtone() loops until stopped; previewRingtone()
  plays a single non-looping preview and auto-cancels the prior preview.
- IncomingCall: ring driven by the setting; <audio> element removed.
- Settings > Calls: Ringtone selector with on-select preview, beside the
  existing Ringtone Volume slider.
- settings.ts: persisted value whitelisted back to a known id.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/CallEmbedProvider.tsx

@@ -40,7 +40,7 @@ import { CallEmbed, useCallControlState } from '../plugins/call';
 import { useSelectedRoom } from '../hooks/router/useSelectedRoom';
 import { ScreenSize, useScreenSizeContext } from '../hooks/useScreenSize';
 import { useMatrixClient } from '../hooks/useMatrixClient';
-import CallSound from '../../../public/sound/call.ogg';
+import { startRingtone } from '../utils/ringtones';
 import { useCallMembersChange, useCallSession } from '../hooks/useCall';
 import { useCallJoinLeaveSounds } from '../hooks/useCallJoinLeaveSounds';
 import { useRemoteAllMuted } from '../hooks/useCallSpeakers';
@@ -103,8 +103,8 @@ function IncomingCall({ dm, info, onIgnore, onAnswer, onReject }: IncomingCallPr
   const canAnswer = livekitSupported && rtcSupported;
   const { room } = info;
 
-  const audioRef = useRef<HTMLAudioElement>(null);
   const [ringtoneVolume] = useSetting(settingsAtom, 'ringtoneVolume');
+  const [ringtoneId] = useSetting(settingsAtom, 'ringtoneId');
 
   const roomName = useRoomName(room);
   const roomAvatar = useRoomAvatar(room, dm);
@@ -125,25 +125,11 @@ function IncomingCall({ dm, info, onIgnore, onAnswer, onReject }: IncomingCallPr
     ),
   );
 
-  const playSound = useCallback(() => {
-    const audioElement = audioRef.current;
-    if (!audioElement) return;
-    audioElement.volume = Math.max(0, Math.min(1, ringtoneVolume / 100));
-    audioElement.play().catch(() => undefined);
-  }, [ringtoneVolume]);
-
   useEffect(() => {
-    const audioEl = audioRef.current;
+    if (info.notificationType !== 'ring') return undefined;
-    if (info.notificationType === 'ring') {
+    const stop = startRingtone(ringtoneId, Math.max(0, Math.min(1, ringtoneVolume / 100)));
-      playSound();
+    return stop;
-    }
+  }, [info.notificationType, ringtoneId, ringtoneVolume]);
-    return () => {
-      if (audioEl) {
-        audioEl.pause();
-        audioEl.currentTime = 0;
-      }
-    };
-  }, [playSound, info.notificationType]);
 
   useEffect(() => {
     const remaining = info.senderTs + info.lifetime - Date.now();
@@ -156,112 +142,107 @@ function IncomingCall({ dm, info, onIgnore, onAnswer, onReject }: IncomingCallPr
   }, [info.senderTs, info.lifetime, onIgnore]);
 
   return (
-    <>
+    <Overlay open backdrop={<OverlayBackdrop />}>
-      <Overlay open backdrop={<OverlayBackdrop />}>
+      <OverlayCenter>
-        <OverlayCenter>
+        <FocusTrap
-          <FocusTrap
+          focusTrapOptions={{
-            focusTrapOptions={{
+            initialFocus: false,
-              initialFocus: false,
+            onDeactivate: () => onIgnore(),
-              onDeactivate: () => onIgnore(),
+            clickOutsideDeactivates: false,
-              clickOutsideDeactivates: false,
+            escapeDeactivates: false,
-              escapeDeactivates: false,
+          }}
-            }}
+        >
-          >
+          <Dialog style={{ maxWidth: toRem(324) }}>
-            <Dialog style={{ maxWidth: toRem(324) }}>
+            <Box style={{ padding: config.space.S400 }} direction="Column" gap="700">
-              <Box style={{ padding: config.space.S400 }} direction="Column" gap="700">
+              <Text size="T200" align="Center">
-                <Text size="T200" align="Center">
+                {getMemberDisplayName(info.room, info.sender) ??
-                  {getMemberDisplayName(info.room, info.sender) ??
+                  getMxIdLocalPart(info.sender) ??
-                    getMxIdLocalPart(info.sender) ??
+                  info.sender}
-                    info.sender}
+              </Text>
-                </Text>
+              <Box direction="Column" gap="500" alignItems="Center">
-                <Box direction="Column" gap="500" alignItems="Center">
+                <Box shrink="No">
-                  <Box shrink="No">
+                  <Avatar size="500" className={CallAvatarAnimation}>
-                    <Avatar size="500" className={CallAvatarAnimation}>
+                    <RoomAvatar
-                      <RoomAvatar
+                      roomId={room.roomId}
-                        roomId={room.roomId}
+                      src={avatarUrl}
-                        src={avatarUrl}
+                      alt={roomName}
-                        alt={roomName}
+                      renderFallback={() => (
-                        renderFallback={() => (
+                        <RoomIcon
-                          <RoomIcon
+                          roomType={room.getType()}
-                            roomType={room.getType()}
+                          size="400"
-                            size="400"
+                          joinRule={room.getJoinRule()}
-                            joinRule={room.getJoinRule()}
+                          filled
-                            filled
+                        />
-                          />
+                      )}
-                        )}
+                    />
-                      />
+                  </Avatar>
-                    </Avatar>
-                  </Box>
-                  <Box grow="Yes" direction="Column" gap="100" alignItems="Center">
-                    <Text size="H3" align="Center" truncate>
-                      {roomName}
-                    </Text>
-                    <Text size="T300" align="Center">
-                      {info.intent === 'video' ? 'Incoming Video Call' : 'Incoming Voice Call'}
-                    </Text>
-                  </Box>
                 </Box>
-                {!livekitSupported && (
+                <Box grow="Yes" direction="Column" gap="100" alignItems="Center">
-                  <Text
+                  <Text size="H3" align="Center" truncate>
-                    style={{ margin: 'auto', color: color.Critical.Main }}
+                    {roomName}
-                    size="L400"
-                    align="Center"
-                  >
-                    Your homeserver does not support calling.
                   </Text>
-                )}
+                  <Text size="T300" align="Center">
-                {!webRTCSupported() && (
+                    {info.intent === 'video' ? 'Incoming Video Call' : 'Incoming Voice Call'}
-                  <Text
-                    style={{ margin: 'auto', color: color.Critical.Main }}
-                    size="L400"
-                    align="Center"
-                  >
-                    Your browser does not support WebRTC, which is required for calling.
                   </Text>
-                )}
-                <Box direction="Column" gap="300">
-                  <Button
-                    style={{ flexGrow: 1 }}
-                    variant="Success"
-                    size="400"
-                    radii="400"
-                    onClick={() => onAnswer(room, info.intent === 'video')}
-                    before={
-                      <Icon
-                        size="200"
-                        src={info.intent === 'video' ? Icons.VideoCamera : Icons.Phone}
-                        filled
-                      />
-                    }
-                    disabled={!canAnswer}
-                  >
-                    <Text as="span" size="B400">
-                      Answer
-                    </Text>
-                  </Button>
-                  <Button
-                    style={{ flexGrow: 1 }}
-                    variant={dm ? 'Critical' : 'Secondary'}
-                    fill="Soft"
-                    size="400"
-                    radii="400"
-                    onClick={() => (dm ? onReject(room, info.refEventId) : onIgnore())}
-                    before={<Icon size="200" src={Icons.Cross} filled />}
-                  >
-                    <Text as="span" size="B400">
-                      {dm ? 'Reject' : 'Ignore'}
-                    </Text>
-                  </Button>
                 </Box>
               </Box>
-            </Dialog>
+              {!livekitSupported && (
-          </FocusTrap>
+                <Text
-        </OverlayCenter>
+                  style={{ margin: 'auto', color: color.Critical.Main }}
-      </Overlay>
+                  size="L400"
-      <audio ref={audioRef} loop style={{ display: 'none' }}>
+                  align="Center"
-        <source src={CallSound} type="audio/ogg" />
+                >
-      </audio>
+                  Your homeserver does not support calling.
-    </>
+                </Text>
+              )}
+              {!webRTCSupported() && (
+                <Text
+                  style={{ margin: 'auto', color: color.Critical.Main }}
+                  size="L400"
+                  align="Center"
+                >
+                  Your browser does not support WebRTC, which is required for calling.
+                </Text>
+              )}
+              <Box direction="Column" gap="300">
+                <Button
+                  style={{ flexGrow: 1 }}
+                  variant="Success"
+                  size="400"
+                  radii="400"
+                  onClick={() => onAnswer(room, info.intent === 'video')}
+                  before={
+                    <Icon
+                      size="200"
+                      src={info.intent === 'video' ? Icons.VideoCamera : Icons.Phone}
+                      filled
+                    />
+                  }
+                  disabled={!canAnswer}
+                >
+                  <Text as="span" size="B400">
+                    Answer
+                  </Text>
+                </Button>
+                <Button
+                  style={{ flexGrow: 1 }}
+                  variant={dm ? 'Critical' : 'Secondary'}
+                  fill="Soft"
+                  size="400"
+                  radii="400"
+                  onClick={() => (dm ? onReject(room, info.refEventId) : onIgnore())}
+                  before={<Icon size="200" src={Icons.Cross} filled />}
+                >
+                  <Text as="span" size="B400">
+                    {dm ? 'Reject' : 'Ignore'}
+                  </Text>
+                </Button>
+              </Box>
+            </Box>
+          </Dialog>
+        </FocusTrap>
+      </OverlayCenter>
+    </Overlay>
   );
 }
 

src/app/features/settings/general/General.tsx

@@ -52,6 +52,7 @@ import {
   MessageLayout,
   MessageSpacing,
   NoiseSuppressionMode,
+  RingtoneId,
   Settings,
   settingsAtom,
 } from '../../../state/settings';
@@ -78,6 +79,7 @@ import { SequenceCardStyle } from '../styles.css';
 import { useTauriUpdater } from '../../../hooks/useTauriUpdater';
 import { useDateFormatItems } from '../../../hooks/useDateFormat';
 import { playCallJoinSound } from '../../../utils/callSounds';
+import { previewRingtone, RINGTONE_OPTIONS } from '../../../utils/ringtones';
 import { DenoiseTester } from './DenoiseTester';
 
 type ThemeSelectorProps = {
@@ -1242,12 +1244,18 @@ function Calls() {
     'callJoinLeaveSound',
   );
   const [ringtoneVolume, setRingtoneVolume] = useSetting(settingsAtom, 'ringtoneVolume');
+  const [ringtoneId, setRingtoneId] = useSetting(settingsAtom, 'ringtoneId');
 
   const handleJoinLeaveSoundChange = (value: 'off' | 'chime' | 'soft' | 'retro') => {
     setCallJoinLeaveSound(value);
     if (value !== 'off') playCallJoinSound(value);
   };
 
+  const handleRingtoneChange = (value: RingtoneId) => {
+    setRingtoneId(value);
+    previewRingtone(value, Math.max(0, Math.min(1, ringtoneVolume / 100)));
+  };
+
   const pttBind = useKeyBind(setPttKey);
   const deafenBind = useKeyBind(setDeafenKey);
 
@@ -1573,6 +1581,19 @@ function Calls() {
           />
         )}
       </SequenceCard>
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Ringtone"
+          description="Sound played for incoming calls. Selecting an option plays a preview."
+          after={
+            <SettingsSelect
+              value={ringtoneId}
+              onChange={(v) => handleRingtoneChange(v as RingtoneId)}
+              options={RINGTONE_OPTIONS}
+            />
+          }
+        />
+      </SequenceCard>
       <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
         <SettingTile
           title="Ringtone Volume"

src/app/state/settings.ts

@@ -20,6 +20,10 @@ export type NoiseSuppressionMode = 'off' | 'browser' | 'ml';
 // CDN. Its wasm is single-threaded, so no COOP/COEP cross-origin isolation is
 // required (see LOTUS_DENOISE_ENGINEERING_REVIEW.md).
 export type DenoiseModelId = 'rnnoise' | 'speex' | 'dtln' | 'deepfilternet';
+// Incoming-call ringtone. 'classic' is the bundled call.ogg clip; 'chime' /
+// 'soft' / 'retro' are synthesized in-browser (see utils/ringtones.ts);
+// 'none' is silent (visual-only incoming-call UI).
+export type RingtoneId = 'classic' | 'chime' | 'soft' | 'retro' | 'none';
 export type ChatBackground =
   | 'none'
   | 'blueprint'
@@ -148,6 +152,7 @@ export interface Settings {
   afkTimeoutMinutes: number;
 
   callJoinLeaveSound: 'off' | 'chime' | 'soft' | 'retro';
+  ringtoneId: RingtoneId;
   ringtoneVolume: number; // 0–100
 
   seasonalThemeOverride:
@@ -243,6 +248,7 @@ const defaultSettings: Settings = {
   afkTimeoutMinutes: 10,
 
   callJoinLeaveSound: 'chime',
+  ringtoneId: 'classic',
   ringtoneVolume: 70,
 
   seasonalThemeOverride: 'auto',
@@ -273,6 +279,15 @@ export const getSettings = (): Settings => {
         saved.callDenoiseModel === 'deepfilternet'
           ? saved.callDenoiseModel
           : defaultSettings.callDenoiseModel,
+      // Coerce any unknown persisted ringtone id back to the default.
+      ringtoneId:
+        saved.ringtoneId === 'classic' ||
+        saved.ringtoneId === 'chime' ||
+        saved.ringtoneId === 'soft' ||
+        saved.ringtoneId === 'retro' ||
+        saved.ringtoneId === 'none'
+          ? saved.ringtoneId
+          : defaultSettings.ringtoneId,
       composerToolbarButtons: {
         ...DEFAULT_COMPOSER_TOOLBAR,
         ...(saved.composerToolbarButtons ?? {}),

src/app/utils/ringtones.ts

@@ -0,0 +1,169 @@
+import CallSound from '../../../public/sound/call.ogg';
+import { RingtoneId } from '../state/settings';
+
+export const RINGTONE_OPTIONS: { value: RingtoneId; label: string }[] = [
+  { value: 'classic', label: 'Classic' },
+  { value: 'chime', label: 'Chime' },
+  { value: 'soft', label: 'Soft' },
+  { value: 'retro', label: 'Retro' },
+  { value: 'none', label: 'Silent' },
+];
+
+export const isRingtoneId = (v: unknown): v is RingtoneId =>
+  v === 'classic' || v === 'chime' || v === 'soft' || v === 'retro' || v === 'none';
+
+type SynthStyle = 'chime' | 'soft' | 'retro';
+
+const clamp01 = (n: number): number => Math.max(0, Math.min(1, n));
+
+// Shared WebAudio context for synthesized ringtones. Kept separate from the
+// join/leave-sound context (callSounds.ts) to keep blast radius small.
+let sharedCtx: AudioContext | undefined;
+const getCtx = (): AudioContext | undefined => {
+  try {
+    if (!sharedCtx || sharedCtx.state === 'closed') sharedCtx = new AudioContext();
+    if (sharedCtx.state === 'suspended') sharedCtx.resume().catch(() => undefined);
+    return sharedCtx;
+  } catch {
+    return undefined;
+  }
+};
+
+type Note = {
+  freq: number;
+  /** Offset from phrase start, in seconds */
+  at: number;
+  /** Duration in seconds */
+  dur: number;
+};
+
+// One looping phrase per synth style + the period before it repeats.
+const PHRASES: Record<
+  SynthStyle,
+  { type: OscillatorType; gain: number; period: number; notes: Note[] }
+> = {
+  // Two-tone "ring … ring" telephone cadence.
+  chime: {
+    type: 'sine',
+    gain: 0.3,
+    period: 3,
+    notes: [
+      { freq: 587.33, at: 0, dur: 0.35 },
+      { freq: 880, at: 0.4, dur: 0.35 },
+      { freq: 587.33, at: 1.0, dur: 0.35 },
+      { freq: 880, at: 1.4, dur: 0.35 },
+    ],
+  },
+  // Gentle rising triangle pair.
+  soft: {
+    type: 'triangle',
+    gain: 0.24,
+    period: 3.2,
+    notes: [
+      { freq: 523.25, at: 0, dur: 0.5 },
+      { freq: 659.25, at: 0.55, dur: 0.7 },
+    ],
+  },
+  // Retro arpeggio sweep.
+  retro: {
+    type: 'square',
+    gain: 0.12,
+    period: 2.4,
+    notes: [
+      { freq: 440, at: 0, dur: 0.12 },
+      { freq: 554.37, at: 0.13, dur: 0.12 },
+      { freq: 659.25, at: 0.26, dur: 0.12 },
+      { freq: 880, at: 0.39, dur: 0.22 },
+    ],
+  },
+};
+
+const playPhrase = (style: SynthStyle, volume: number): void => {
+  const ctx = getCtx();
+  if (!ctx) return;
+  const { type, gain: peak, notes } = PHRASES[style];
+  const scaledPeak = peak * clamp01(volume);
+  if (scaledPeak <= 0) return;
+  const now = ctx.currentTime;
+  notes.forEach(({ freq, at, dur }) => {
+    const osc = ctx.createOscillator();
+    const gain = ctx.createGain();
+    osc.type = type;
+    osc.frequency.value = freq;
+    const start = now + at;
+    // Short attack + exponential decay to avoid clicks.
+    gain.gain.setValueAtTime(0, start);
+    gain.gain.linearRampToValueAtTime(scaledPeak, start + 0.015);
+    gain.gain.exponentialRampToValueAtTime(0.0001, start + dur);
+    osc.connect(gain);
+    gain.connect(ctx.destination);
+    osc.start(start);
+    osc.stop(start + dur + 0.02);
+  });
+};
+
+const startClassic = (volume: number, loop: boolean): (() => void) => {
+  let audio: HTMLAudioElement | undefined;
+  try {
+    audio = new Audio(CallSound);
+    audio.loop = loop;
+    audio.volume = clamp01(volume);
+    audio.play().catch(() => undefined);
+  } catch {
+    audio = undefined;
+  }
+  return () => {
+    if (!audio) return;
+    audio.pause();
+    audio.currentTime = 0;
+    audio = undefined;
+  };
+};
+
+const startSynth = (style: SynthStyle, volume: number, loop: boolean): (() => void) => {
+  playPhrase(style, volume);
+  if (!loop) return () => undefined;
+  const period = PHRASES[style].period * 1000;
+  const id = window.setInterval(() => playPhrase(style, volume), period);
+  return () => window.clearInterval(id);
+};
+
+/**
+ * Start an incoming-call ringtone, looping until the returned stop fn is
+ * called. `volume` is 0..1. Returns a no-op stop fn for 'none'.
+ *
+ * Synthesized styles share the WebAudio autoplay limitation of the bundled
+ * 'classic' file: until the page has had a user gesture the browser may keep
+ * audio suspended, so the very first ring after a cold page load can be
+ * silent. This matches the pre-existing behaviour of the classic ringtone.
+ */
+export const startRingtone = (id: RingtoneId, volume: number): (() => void) => {
+  if (id === 'none') return () => undefined;
+  if (id === 'classic') return startClassic(volume, true);
+  return startSynth(id, volume, true);
+};
+
+// Only one preview may sound at a time; starting a new one cancels the last.
+let activePreviewStop: (() => void) | null = null;
+
+/**
+ * Play a single, non-looping preview of a ringtone (used by Settings).
+ * Auto-stops the bundled 'classic' clip after a few seconds and cancels any
+ * previously-playing preview. Returns a stop fn for early cancellation.
+ */
+export const previewRingtone = (id: RingtoneId, volume: number): (() => void) => {
+  activePreviewStop?.();
+  activePreviewStop = null;
+  if (id === 'none') return () => undefined;
+
+  const stop = id === 'classic' ? startClassic(volume, false) : startSynth(id, volume, false);
+  let timer = 0;
+  const wrapped = () => {
+    window.clearTimeout(timer);
+    stop();
+    if (activePreviewStop === wrapped) activePreviewStop = null;
+  };
+  timer = window.setTimeout(wrapped, 4000);
+  activePreviewStop = wrapped;
+  return wrapped;
+};